|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||521/64 ; 210/50028 ; 264/28 ; 264/49|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 23 인용 특허 : 5|
Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The phase-separated system comprises a polymer phase and a solvent phase, each of which is substantially continuous within the other. The morphology of the polymer phase prior to and subsequent to freezing determine the morphology of the resultant foam. Both isotropic and anisotropic foams can be produced. If i...
In a process for preparing a microporous, low-density foam having a nominal cell size of from about 1-20 micrometers and a density of less than about 0.1 g/cc comprising the steps of: forming a homogeneous initial solution of a polymer in a solvent therefor at a temperature at which said polymer is essentially completely soluble in said solvent, cooling said solution at a rate such that said solution forms a phase-separated system comprising two distinct phases, each of which is continuous within the other and wherein one phase comprises essentially said...